[Feature request] Add support for splitting into separate MP3 chapters

[IOI-655321]

Would be nice to have an option to split the converted audiobook into separate files based on chapters in the audible file. This makes uploading to services such as Google Play Music a nicer experience as its a number of smaller files and its easier to jump between chapters in a standard music player rather than specific audiobook software.

[castdrian]

I guess that would work if I'd be able to figure out a way to parse
ffprobe -i filename -print_format json -show_chapters -loglevel error
and then somehow get ffmpeg to split it by that. another possibility would be executing a python script, but I don't know any python so no idea how to modify it to work as needed,

[IOI-655321]

I found these (dont have dev setup to test anything though)

https://github.com/harryjackson/ffmpeg_split

https://github.com/valekhz/m4b-converter

[luckylittle]

This would be awesome. I am currently using libmp3splt-0.9.2/mp3splt-2.6.2 with the following parameters:

mp3splt -s -P -p th=-40,min=6 <file.mp3> dry mode to see how many tracks and then adjust accordingly

For example 560min long audiobook will be split into 47 parts using this:

mp3splt -s -p th=-30,min=5 <file.mp3>

[IOI-655321]

Found this recently.

https://github.com/PrometeoConseil/AudioBookSplitter